One question, though: Doesn't USB 3.0 also use an optical link as part of its data transmission method? I'm sure that USB 3.0's link is not as fast as Lightpeak, but it would make these combo Lightpeak/USB3 ports more economical if I am correct in this.

I am super excited about light peak. between light peak and display port those are the interfaces i want. even though lightpeak could do display port's work too, i think its best to have a dedicated display technology.

Probably as soon as Intel starts pushing it. Intel has a lot of sway with the hardware manufacture and is a large hardware manufacturer. Plus this is a fairly nifty standard that has a lot of value. As long as the costs aren't too high I would not be surprised if this becomes ubiquitous on new PC within a couple years of it commercial release.